近几年河北棉区常在棉花蕾期出现雹灾天气 ,造成大面积棉苗无顶尖 ,甚至成光秆 ,减产严重。深州市 1 998年 6月 2 1日傍晚突降一场特大冰雹 ,造成 1 0余个村的保铃棉新棉 33B棉田受害。据不完全统计 ,受害面积 1 0 0 hm2以上 ,部分村的棉田 70 %以上植株仅剩 1 0～ 1 5cm长棉秆 In recent years, Hebei cotton haze weather often occur in the cotton bud stage, resulting in a large area of ​​cotton seedlings without top, or even light stalk, a serious cut. Shenzhou City, on the evening of June 21, 1998, collapsed sharply in a hail of hail, causing the cotton boll boll 33B cotton field in more than 10 villages to suffer. According to incomplete statistics, the affected area is more than 100 hm2, and 70% or more of the cotton fields in some villages have only 10 ~ 15 cm long cotton stalks